/* ============================================================
   KD3.0 公开网站 · 深色现代主题设计系统
   作用域：仅 .site（公开页面），不影响管理后台（_AdminLayout）
   ============================================================ */

/* ---------- 设计变量 ---------- */
.site {
    --bg: #0d1117;
    --bg-soft: #131820;
    --surface: #1a212c;
    --surface-2: #232c3a;
    --border: #2a3342;
    --text: #e8ecf3;
    --text-2: #a3adbf;
    --text-3: #6b7688;
    --accent: #5b8cff;
    --accent-2: #22d3ee;
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    --radius: 10px;
    --shadow: 0 8px 24px rgba(0, 0, 0, .35);

    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.75;
    padding-top: 0;
}

.site a { color: var(--accent); text-decoration: none; transition: color .2s; }
.site a:hover { color: var(--accent-2); }

.site h1, .site h2, .site h3, .site h4, .site h5 {
    color: var(--text);
    font-weight: 700;
    line-height: 1.4;
}
.site img { max-width: 100%; }

/* ---------- 布局容器 ---------- */
.site .container-site {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}
.site .body-content { padding: 0; }

/* ---------- 导航栏 ---------- */
.site .navbar-site {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 17, 23, .85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.site .navbar-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 58px;
}
.site .navbar-brand {
    color: var(--text) !important;
    font-weight: 700;
    font-size: 17px;
    letter-spacing: .3px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.site .navbar-brand .brand-mark {
    width: 26px;
    height: 26px;
    border-radius: 7px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 13px;
    font-weight: 800;
}
.site .navbar-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.site .navbar-menu a {
    color: var(--text-2);
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 14px;
}
.site .navbar-menu a:hover { color: var(--text); background: var(--surface); }
.site .navbar-menu a.active { color: var(--accent); font-weight: 600; }
.site .navbar-toggle-btn {
    display: none;
    background: none;
    border: 1px solid var(--border);
    color: var(--text-2);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 16px;
    cursor: pointer;
}

/* ---------- Hero ---------- */
.site .hero {
    padding: 76px 0 60px;
    text-align: center;
    background:
        radial-gradient(600px 260px at 50% -80px, rgba(91, 140, 255, .18), transparent 70%),
        radial-gradient(500px 220px at 85% 0%, rgba(34, 211, 238, .12), transparent 70%);
}
.site .hero .hero-title {
    font-size: 40px;
    font-weight: 800;
    margin: 0 0 14px;
    background: linear-gradient(120deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.site .hero .hero-sub {
    color: var(--text-2);
    font-size: 17px;
    max-width: 640px;
    margin: 0 auto 28px;
}
.site .hero-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---------- 按钮 ---------- */
.site .btn-site {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 26px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform .15s, box-shadow .2s, background .2s;
}
.site .btn-primary-grad {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    box-shadow: 0 6px 20px rgba(91, 140, 255, .35);
}
.site .btn-primary-grad:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 8px 26px rgba(91, 140, 255, .5); }
.site .btn-outline {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
}
.site .btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

/* ---------- 区块标题 ---------- */
.site .section { padding: 46px 0; }
.site .section-title {
    font-size: 26px;
    margin: 0 0 6px;
    text-align: center;
}
.site .section-sub {
    color: var(--text-3);
    text-align: center;
    margin: 0 0 30px;
}

/* ---------- 卡片 ---------- */
.site .card-site {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 24px;
    transition: border-color .2s, transform .2s, box-shadow .2s;
}
.site .card-site:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.site .card-site .card-title { font-size: 18px; margin: 0 0 10px; display: flex; align-items: center; gap: 10px; }
.site .card-site .card-desc { color: var(--text-2); margin: 0; font-size: 14px; }

/* 功能亮点网格 */
.site .grid-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.site .grid-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

/* ---------- 步骤卡 ---------- */
.site .step-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    gap: 14px;
    transition: border-color .2s;
}
.site .step-card:hover { border-color: var(--accent); }
.site .step-card .step-no {
    flex: 0 0 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}
.site .step-card .step-title { font-size: 16px; font-weight: 700; margin: 0 0 6px; }
.site .step-card .step-desc { color: var(--text-2); font-size: 13.5px; line-height: 1.7; margin: 0; }

/* 竖排步骤（教程页） */
.site .steps-vertical { display: flex; flex-direction: column; gap: 14px; }
.site .steps-vertical .step-card { padding: 18px 22px; }
.site .steps-vertical .step-card .step-title { font-size: 18px; }

/* ---------- 提示框 ---------- */
.site .callout {
    border-left: 3px solid;
    border-radius: 0 8px 8px 0;
    padding: 10px 14px;
    font-size: 14px;
    margin: 12px 0;
    line-height: 1.7;
}
.site .callout-note { border-color: var(--accent); background: rgba(91, 140, 255, .08); color: var(--text-2); }
.site .callout-warn { border-color: var(--warning); background: rgba(251, 191, 36, .08); color: var(--text-2); }
.site .callout-danger { border-color: var(--danger); background: rgba(248, 113, 113, .08); color: var(--text-2); }

/* ---------- 标签 ---------- */
.site .tag {
    display: inline-block;
    font-size: 12px;
    padding: 1px 9px;
    border-radius: 999px;
    font-weight: 600;
    vertical-align: 1px;
}
.site .tag-auto { color: var(--success); background: rgba(52, 211, 153, .12); }
.site .tag-manage { color: var(--accent); background: rgba(91, 140, 255, .12); }
.site .tag-more { color: var(--warning); background: rgba(251, 191, 36, .12); }

/* ---------- 教程图片 ---------- */
.site .tutorial-img {
    max-width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin: 10px 0;
    display: block;
}
.site .tutorial-img + .tutorial-img { margin-top: 6px; }

/* ---------- 功能列表（功能介绍页） ---------- */
.site .feature-list { list-style: none; margin: 12px 0 0; padding: 0; }
.site .feature-list li {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.8;
    padding: 4px 0;
    border-bottom: 1px dashed rgba(42, 51, 66, .6);
}
.site .feature-list li:last-child { border-bottom: none; }
.site .feature-list li strong { color: var(--text); font-weight: 600; }

/* ---------- 联系方式 ---------- */
.site .contact-card {
    max-width: 560px;
    margin: 0 auto;
    padding: 34px 36px;
    text-align: center;
}
.site .contact-card .contact-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 0;
    border-bottom: 1px dashed rgba(42, 51, 66, .6);
}
.site .contact-card .contact-item:last-child { border-bottom: none; }
.site .contact-card .contact-label { color: var(--text-3); font-size: 14px; }
.site .contact-card .contact-value { color: var(--text); font-size: 16px; font-weight: 600; }

/* ---------- 程序下载 ---------- */
.site .download-info {
    padding: 4px 6px;
}
.site .download-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 13px 0;
    border-bottom: 1px dashed rgba(42, 51, 66, .6);
    flex-wrap: wrap;
}
.site .download-row:last-child { border-bottom: none; }
.site .download-label { color: var(--text-3); font-size: 14px; }
.site .download-value { color: var(--text); font-size: 15px; word-break: break-all; }
.site .download-version {
    color: var(--accent-2);
    font-size: 22px;
    font-weight: 700;
    font-family: Consolas, "Microsoft YaHei", monospace;
}
.site .download-file { font-family: Consolas, "Microsoft YaHei", monospace; color: var(--text-2); }
.site .download-hash {
    display: block;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 14px;
    margin: 6px 0 14px;
    color: var(--accent-2);
    font-size: 13px;
    word-break: break-all;
    line-height: 1.7;
}

/* ---------- 版本历史时间线 ---------- */
.site .timeline {
    position: relative;
    padding-left: 28px;
}
.site .timeline::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: linear-gradient(180deg, var(--accent), rgba(34, 211, 238, .25));
    border-radius: 2px;
}
.site .timeline-item {
    position: relative;
    margin-bottom: 20px;
}
.site .timeline-item:last-child { margin-bottom: 0; }
.site .timeline-marker {
    position: absolute;
    left: -28px;
    top: 20px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--bg);
    border: 3px solid var(--accent);
    box-shadow: 0 0 0 4px rgba(91, 140, 255, .15);
}
.site .timeline-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 20px;
    transition: border-color .2s;
}
.site .timeline-card:hover { border-color: var(--accent); }
.site .timeline-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}
.site .timeline-version {
    color: var(--accent-2);
    font-size: 17px;
    font-weight: 700;
    font-family: Consolas, "Microsoft YaHei", monospace;
}
.site .timeline-date {
    color: var(--text-3);
    font-size: 13px;
}
.site .timeline-desc {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.8;
}
.site .timeline-desc .md-h3 {
    color: var(--text);
    font-size: 16px;
    margin: 14px 0 6px;
}
.site .timeline-desc .md-h4 {
    color: var(--text);
    font-size: 14px;
    margin: 12px 0 4px;
}
.site .timeline-desc .md-p {
    margin: 6px 0;
    color: var(--text-2);
}
.site .timeline-desc .md-list {
    margin: 6px 0;
    padding-left: 20px;
}
.site .timeline-desc .md-list li { margin: 4px 0; }
.site .timeline-desc .md-list li strong { color: var(--text); }
.site .timeline-desc .md-quote {
    margin: 8px 0;
    padding: 8px 12px;
    border-left: 3px solid var(--accent);
    background: rgba(91, 140, 255, .08);
    border-radius: 0 6px 6px 0;
    color: var(--text-2);
}
.site .timeline-desc .md-inline-code {
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 5px;
    color: var(--accent-2);
    font-size: 13px;
}
.site .timeline-desc .md-code {
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 14px;
    overflow-x: auto;
    color: var(--text-2);
    font-size: 13px;
}

/* ---------- 页脚 ---------- */
.site .site-footer {
    border-top: 1px solid var(--border);
    margin-top: 40px;
    padding: 26px 0 34px;
    color: var(--text-3);
    font-size: 13px;
    text-align: center;
}
.site .site-footer a { color: var(--text-3); }
.site .site-footer a:hover { color: var(--text-2); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .site .grid-features { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .site .grid-steps { grid-template-columns: repeat(2, 1fr); }
    .site .hero { padding: 52px 0 40px; }
    .site .hero .hero-title { font-size: 30px; }
    .site .navbar-menu {
        display: none;
        position: absolute;
        top: 58px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(13, 17, 23, .97);
        border-bottom: 1px solid var(--border);
        padding: 10px 16px 16px;
        gap: 2px;
    }
    .site .navbar-menu.open { display: flex; }
    .site .navbar-menu a { display: block; padding: 11px 12px; }
    .site .navbar-toggle-btn { display: block; }
    .site .contact-card { padding: 24px 20px; }
}
@media (max-width: 520px) {
    .site .grid-features,
    .site .grid-steps { grid-template-columns: 1fr; }
    .site .section { padding: 34px 0; }
}